Mother Nature may not need it, or provide it, but growers of all types have been going out of their way to improve on mother nature since cultivation began way back when. I dont see anything wrong with helping mom out some - especially of it improves yields, quality, is faster, easier, cheaper, etc etc
Mother nature doesnt do hydro, or LED, or HPS lights, or have special additives, or selective trimming, or maintain optimum temps, or do selective breeding, or keeping PH, EC, etc within optimum limits, or providing extra O2 or CO2, when possible, treating for pests, diseases, etc etc etc.
By doing everything we can to help out, we get more, better, faster results. Thats the whole point of this website - to grow better weed than mother nature does by herself. At least, thats what Im trying to do
If you dont believe in helping mother nature out, then just toss some seeds out the back door and hope for the best